Change-speed-control mechanism



E. HED AND J. A. HELLSING.

CHANGE SPEED CONTROL MECHANISM. APPLICATION FILED JULYI9, I921.

1 ,4L8,880 Patented Nov. 7, 1922.

E. HED AND J. A. HELLSING.

CHANGE SPEED CONTROL MECHANISM. APPLICATION HLED JULYIVQ, 19,21.

, 11,434,384. Patented Nov. 7, 1922.

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r 155 722 0 1 a e m Patented Nov. 7, i922.

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Parent c erics. I

movers) HED, or STOGKHOLM, AND .JOI-IAN AUGUST HELLSING, or BARKARBY, .SWEDEN.

CHANGE=SPEED-CONTROL MECHANISM.

Application filed Jul 19,

To all whom it may concern:

'Be it known that we, Envnm) TIE-n, residing "at Karlbergsvagen 57, in the city of Stockholm, Sweden, and JOHAN Aoous'r HELLsING, residing at Barkarby, Sweden, both subjects oftlie King of Sweden, have invented a Cl'12t'DgB SPQBCl-COHtI'Ol h'lechanism, ofwhich the following is a sp'ea'riflcation.

()ur invention relatesto the changespeed control mechanism for automobiles and similar motoratlriven vehicles and preferably for automobiles of the type, where the shaft of the gear which is intended to engage any one of a series of coaxial gears of different size is mounted in a support adapted to be swung on and slid along a fixed shaft.

Our invention'is an improvement of the mechanism for that purpose shown and described in the Patent 1,108,784. where toothed sector fastened on the hub or nave of the swing'able .and slidable support en'- gages a rack on a slidable and turnable shaft on which the hand lever is fastened so that the hand lever must be. swung and then moved sidewise when changing the speed. j

One of the objects of our invention is to avoid the sidewise movement of the lever, i. e., the longitudinal movement of its shaft or pivot, and'to diminish the range ofits turning movement, 1

Another object is to make the change of the speed automatic so that the lever'may be adjusted for a desired speed beforehand and the vehicle may run further with'its present speed and the change to the new-speed for which the lever has been adjusted may be effected automatically when a pedal or the like is actuated.

On the accompanyingdrawings I Fig. 1 is a plan view the lever and the means for keeping it in the adjusted position. 1 I I Fig. 2 is a vertical longitudinal section of the mechanism.

Fig. 2 is a side view of the pivot of the lever showin that said pivot may be provided with a universalj'oint.

Fig. 3 is a horizontal section on line 3-3 and Fig. at a vertical cross section on line -14 of F ig. 2.

a is the support in which ajportion of the driving shaft dismounted. The have b 1921. Serial No. 485,889}

driving shaft may be passed as shown in Fig. 4. The teeth of'the sector 0 engage the teeth of a rack 1 fixed on a sleeve Z which is keyed on a transverse shaft .9 mounted in the sides of the box or casing a" and adapted to rotate (about a quarter of a turn) but not slide in its bearings. l

The sleeve Z with its rack '1 partakes in the rotation of the shaft 8 but is adapted to slide along it. I

An arm 6 keyed on the shaft 8 engages a circular groove or two parallel ring flanges 71 on the nave ofthe support. Apedal p is keyed to the shaft 8 outsid the box a. lVhen the operator presses upon thepedal p, the shaft 3 is turned counterclockwise (Fig 2), and thereby the support a is slid to the right (by means of the arm 6) for'di'sengaging the driving gear from the drivengear. A spring A; on shaft 0 pushes the support in opposite direction.

The operating hand lever j is keyed to a vertical shaft 2' adapted to rotate in fixed bearings. An arm 11 adapted to swing on shaft i engages a groove 9 on a double-conic portion. 12 of the sleeve l.

Above the arm 11 a segment 13 is keyed to thesha'ft- In depending lugs M on said segment lisfixed a pin 15 which is passed through an elongated slot 16 in the arm 11. Springs 17, 18 passed on the pin tend to bring thearmll to partake in the movement of thesegment '13, when the lever j is swung in either direction for moving the rack r along'the shaft 3 so as to swing the support a. (when the gears are disengaged) to a suitable position for a desired speed.

Fixed coaxially with the shaft 0 in the box 00 is a curved plate m whiclrhas a slot at with branches n n n a 71 A stud t on support a engages said slot n and moves along it when the support is swung. Owing to the sfpringk on the shaft 0 the stud 25 will enter the branch slots when it is opposite any of these. In the position Fig. 2 the stud engages theslot w which corresponds to the highest speed. The slot 92- is [for the lowest speedand n "for a medium speed. Slot n "is for back-movement and slot or for stand I still.

19, a flange 20 of which has notches corresponding to the slots n n n a and n? and is held in desired position by engaging said notches. f In the example shown- "a spring rod 21, fixed to the lever engages the notches.

Supposing the stud t be in slot 11 (highest dium speed). For this purpose the opera.- tor presses down the r0d'21 so as to disengage it from the notched flange and swmgs the lever to a positioncorresponding to th e slot M. The rod 21 will engage thee-errespond ng notch in the flange- 2'0 and lock thelever j 1n this new position. The segment13 part'akes in the movement of the levei 7',and'the springs 17, 18 tend to more thearm 11' the same way. This arm 1.1 can not partake, however, in the movement as the support a is locked by the stud t engaging the slot Thus the spring 17 will be compressed. For allowing the arm I'll to move itis necessary to press, down the pedal yd so as to disengage the stud t from the slot 77. .After such disengagement the compressed spring 17v will. innnediately move the arm 11 to the right (Figs. 3, at), i. e. swing the support a to a positionwitli the stud t opposite the slot 17. and when the pressure on the pedal ceases the spring 717 will push the supportto the left (Fig.2) so that the stud enters the slot at. In the same manner the-stud tlis shifted to anyone of the slots in the plate m by shifting the hand lever to the corresponding notch in the i'lange20 and pedal.

The spring shown on the shaft 8 is inthen pressing down the "tended to balance the weight of the support a when this is in a sloping position. i v

In order to prevent the arm ll from beingjswung toofar by the compressedspring '17 or 18 when the pedal is pressed down the following means is provided. v

Between lugs 31, 32 inside the bore is pivoted a trigger 33. A'spring '23 fixed to the segment 13 has a cam 24C which, when resting underneath a finger 3e. projecting from the'trigger, willkeep the trigger in. a position adaptedto slide on the double-conic portion '12 of the sleeve Z when this passes the trigger and toengage the groove g'when this crosses the path of. the trigger so that the sleeve Z, rack r and support aavill be 'stoppedand locked 'byjthe'trigger in a certain position corresponding'to one of the intermediate slots for instance a An- The plane of rotation of theihaiid lever j may be sloping if preferred. For this purpose the shaft 2' may be in two portions con- 'nected by a-univer'sal jointas indicated in speed) and shall be shifted to slot n (me- 2 .To avoid m sunderstanding it may be noted "thatthe'iorms and details now descr bed and shown on the drawings are exand should correspondv to the; number off speeds iorwhic h the gear ng-is constructed.

flhesslot rfis not necessary but maybe useful for preventing accidental sliding of the stud 25 from the standstill position.

The sector-o and rack 1' may be replaced A by anyother suitable means for transferring movement from the sleeve Z to the support 04. Instead ,Of the spring rod 21 any other means.- for locking the lever inthe adjusted position may be used of course For preventing theft of the. automobile the shaft 2' of thelever may he made in two parts 4:0, at]. locked together inflsuch. a

manner that the upper part together, with the lever 7' can be quicklyftaken away. In the example shown in 2 the upperpart 4; has a stud L2 with a key adapted to. be passed into a slotted socket .43 in the lower part tQ or vice versa i The hearing 44 of the projection 46 on which a member 47 ispivoted by a pin 418 and adapted. to engage a flange 49 on the lower end of theupper part lower part atO hasa it i A, loose stud fiQ placed in a, socket-in member .47 I engages. groovein the projection L6 so as to keep the member 47 in the locking position. A spring 51. which rests against a screw. 52 or the like keeps the stud 50 in working position but is adapted'to yield whenthe member 47 is swung side-v wise for disengaging 1t from the flange when. p

the lever with part ilshouldbe taken away. It is obvious thatv any other suitable means may be used for the same purpose.

lVhat weclaim is; p i 1. A. controlmechanism .for change speed gearings where a portion of the driving shaft is mounted in a swingable and slidable support, characterized by a handxlever; an

arm adapted toswing on the pivot of said lever and engaging sleeve keyed; ong-and adapted to slide along a turnable shaftso as to swing thesupport, spr ngs act ng upon said arm andadapted to move the arm corresponding to a previous movement of the H lever for shifting the position of the sleeve and thereby the position of the support 2. A change speedcontrolimechanism comprising a slidable and turnable support for a portion of the driving shaft, a transverse shaft with an arm which engages the support, a pedal for turning said shaft so as to slide the support and disengage the gears, a spring for pushing the support in opposite direction, a sleeve adapted to slide on the transverse shaft, means for transferring movement from the sleeve to the support so as to swing the latter when the gears are disengaged, a hand lever with a vertical pivot, a loose arm on the pivot which arm engages the sleeve, and yielding means which tend to bring the arm to partake in the movements of the hand lever, means for locking the support in different positions, means for locking the lever in corresponding positions, the yielding means being adapted to slide the sleeve and swing the support to a position determined by a previous adjustment of the position of the lever.

3. A change speed control mechanism comprising a support adapted to swing and slide on a fixed shaft, a. spring on said shaft adapted to slide the support in one direction, a transverse shaft, a sleeve keyed on and adapted to slide along said shaft, an arm keyed on said shaft and engaging the support, a pedal adapted to turn the shaft so as to slide the support in opposite direction, a rack on the sleeve engaging a toothed sector on the support, a hand lever with a vertical pivot, an arm on said pivot engaging the sleeve and adapted to swing independently of the lever, a segment. fixed on the pivot, springs between the arm and lugs on the segment and adapted-to swing the arm so as to slide the sleeve and thereby swing the support to a position corresponding to a previ ously adjusted position of the arm when the pedal is actuated.

4. A change speed control mechanism set forth in claim 2, including means for stopping and locking the sleeve when the proper position has been reached.

5. A change speed control mechanism as set forth in claim 2, including means for stopping and locking the sleeve consisting of a double-conic portion of the sleeve, a trigger, a spring partaking in the movement of the hand lever and adapted to swing the trigger into the path of said portion so as to engage a groove on the sleeve.

6. A change speed control mechanism as set forth in claim 2, including means for stopping and locking the sleeve consisting of a double-conic portion of the sleeve, a trigger, a spring partaking in the movement of the hand lever and adapted to swing the trigger into the path of said portion so as to engage a groove in said sleeve, and a second spring adapted to swing the trigger off the path of the sleeve when not actuated by the first mentioned spring, and means for limiting said movement.

7. A. change speed control mechanism as set forth in claim 2, including means for stopping and locking the sleeve when the proper position is reached, said means consisting of aspring fixed. on the pivot of the hand lever and having a cam adapted to engage a finger on a trigger so as to bring the trigger into the path of a double-conic portion of the sleeve, said portion having a groove for catching the trigger so as to be stopped and locked by the trigger, a spring weaker than the mentioned spring and adapted to swing the trigger off the path of the sleeve when not engaged by the other spring, and a stop for limiting the disengaging movement of the trigger.

' EDVARD HED.

JOHAN AUGUST HELLSING.

\Vitnesses NILs LUNDBERG, S. ERICSSON. 

